Grinding-mill



Grinding Mm Patented Dec, 16, 1856.

i I v W UNITED STATES PATENT FFID.

THOS. B. STOUT, OF KEYPORT, NEIV JERSEY.

GRINDING-MILL.

Specification of Letters Patent No. 16,249, dated December 16, 1856.

To all whom it may concern:

Be it known that I, THOMAS B. STOUT, of Keyport, in the county ofMonmouth and State of New Jersey, have invented a new and ImprovedGrinding Mill; and I do hereby declare that the following is a full andexact description thereof, reference being had to the accompanyingdrawings, making a part of this specification, Figure 1, being a plan ofthe mill; Fig. 2, a side elevation of the inner bur; Fig. 3, a centralvertical section of the outer bur or shell; Fig. 4, a horizontal sectionof both burs.

Like letters designate corresponding parts in all the figures.

The outer bur, or shell, C, is secured in a suitable frame A, by ears 9i, (Fig. 1,) or any other suitable means. The inner bur D, is caused torevolve in the bur O, by means of a sweep or'lever, B, if horses orother animals are employed to drive it; only any suitable arrangement,of steam, water, or any similar power as applied. The said inner bur issupported at the bottom by a journal m, (Fig. 2,) which rests in anadjustable bridge-tree, so that the bur may be adjusted to any desiredposition within the outer bur. Instead of employing a journal and bushat the top, I make the upper portion h, (Fig. 2,) of the inner burcylindrical, and cause it to fit and turn within the ring or flange 39,(Fig. 3,) projecting inwardly from the top of the outer bur C. If it isdesired to avoid the full amount of friction which so much bearingsurface might occasion, anti-friction rollers Z, Z, Z, may be locatedupon the top of the outer bur, in such positions as to bear against thesaid cylindrical portion of the inner bur D, as shown in the drawings.The burs are represented but slightly conical; but any degree of tapermay be given them, which may be desired.

In order to crush the cobs, when corn and cobs are to be groundtogether, I make use of the sides of the inner bur itself, in connectionwith the peculiar construction of the feeding boxes, or hoppers, and theform of dies given to the outer bur as follows: A number of feedingcavities, or hoppers, a, a, are formed in the top of the inner bur D, ofsuch a shape that one side shall be radial and vertical, or nearly so,while the bottom slopes down from the other radial side gradually to theabrupt or vertical side. This arrangement is designed to cause the earsof corn to descend to the feeding The dies on the surfaces of the burs,is

formed in the following manner At suitable intervals, to be determinedby the numher and fineness of the intermediate ridges, (presently to bespecified) I form a series of ridges Z), 7), running up and down thewhole length of the grinding surface of each bur. At the top, betweenthese cutting ridges the spaces f, f, are destitute of ridges and areconsiderably deeper than the furrows between the ridges below. Thesedeep spaces receive the whole grains of corn, and the pieces of cobs, asthey are cut off by the joint, shearing action of the edges of thefeeding holes g, g, in the inner bur, and the ridges b, b, of the outerbur. Below these spaces f, f, are formed the fine ridges and furrows forgrinding. Of these interme diate ridges, there is to be an odd number,say three, or seven, between each two adjacent long furrows Z), Z). Themiddle ridges 0, c, c, of each set extend upward. about as high as thebottoms of the feeding apertures g, 9. Then, if there are seven ridgesin the set, the middle ones d, cl, between the ridges 0, c, and Z), Z)extend upward not so high as said ridges 0, c, by a few inches; and theremaining intermediate ridges c, c, reach upward not so far as theridges (Z, (Z, by a few inches. If there are but three ridges in eachset, then the ridges CZ, (Z eX tend upward about half way between theheight of the ridges (Z, (Z, and e, c. The whole arrangement of theseridges and furrows is clearly shown in Figs. 2, and 3. This arrangementof the fine ridges together with the breaking ridges b, b, and feedingspaces 7", 7, causes the feeding and grinding to proceed withoutclogging.

A mill constructed in the above manner, serves both for grinding cornand cobs, and also shelled corn; and is cheaper than any mill of equal(efficiency, heretofore invented, within my knowledge.

I do not claim simply feeding the corn or grain through the sides of oneof the burs nor do I claim a dress composed of alternate long and shortridges, together with ieefiding spaces in themselves, separately;

What I do claim as my invention and The above specification, signed andWitdesire to secure by Letters Patent is messed. this twenty-sixth dayof August,

The arrangement and combination of the 1856. feeding cavities a, 0;,feeding aperture 9, 9, THOS. B. STOUT; 5 and the form of dress given tothe grind- Witnesses:

ing surfaces, substantially as herein speci- ANDREW T. SERVEN, fied.JOHN L. SERVEN.

